2 Jan 2021
Redox and photosynthesis: A simple concept, a complicated procedure
What is the relationship between redox and photosynthesis, and is it as simple as counting the oxidation numbers? Tease your brain with…
11 Dec 2020
Paper chromatography TYS questions – N Level Chemistry
Dye dye must try these typical TYS questions on separating dyes with paper chromatography!
12 Oct 2020
Reactivity guidebook
What exactly does reactivity mean? Muse on it with this curated list of O Level TYS questions.
6 Sep 2020
Ask a chemist: Were dinosaurs warm-blooded?
Isotopes are chemically similar but not identical. Their subtle difference makes them an excellent tool to find out if dinosaurs were warm…
9 Jul 2020
2019 O Level Pure Chemistry Practical Paper
What can be more practical than revising for practical exam with past-year practical papers?
4 Jul 2020
Qualitative analysis TYS questions – Combined Chemistry
Go with the flow and solve flowchart questions that are commonly featured in Combined Science QA
27 Jun 2020
Acids & bases TYS questions – Combined Chemistry
Move from basic questions to acidic, I mean challenging, TYS questions taken from the Combined Science papers
25 Jun 2020
Stoichiometry TYS questions – Combined Chemistry
There is no stoichiometry without try: try out questions from the O Level Combined Chemistry papers
19 Jun 2020
Purifying water
Read about the Singapore water story, as told through the lens of a chemist, and learn the separation techniques and chemicals involved in…
12 Jun 2020
Salt preparation TYS questions
It's big brain time, as you think backwards from the salt in question to infer the reagents and method
11 Jun 2020
Electrolysis & simple cell TYS questions
Use our Electrolysis Guidebook to conquer these electrifying O Level questions
10 Jun 2020
Enthalpy change TYS questions
Are O Level questions exothermic? Feel the heat as you attempt challenging exam questions.
6 Jun 2020
O Level titration TYS questions
Don't let the difficult question from the 2014 paper be your endpoint. Overcome it here!
26 May 2020
Oxylithe, the oxygen cake of the 1900s
Practise data-based questions as you travel back in time to find out how chemists overcame safety and design problems to deliver fresh air…